Documents / Report
This is Project Blue Book Special Report No. 14, "Analysis of Reports of Unidentified Aerial Objects," Project No. 10073, dated 5 May 1955. The study reduced about 4,000 sighting reports received by the U.S. Air Force between June 1947 and December 1952 to IBM punched cards and analyzed them statistically, including chi square tests comparing knowns with unknowns. It concludes that the reports very probably do not represent technological developments beyond present scientific knowledge, and it notes that no case produced physical evidence.
“meteor”15 pages
LIST OF ILLUSTRATIONS (Continued) Paiie Figure 14 Distribution of Object Sightings by Months Among the Eight Duration Groups for All Years 30 Figure 15 Distribution of Object Sightings by Shape of Object(s) Reported With Evaluation Distribution for Each Shape Group -31 Figure 16 Distribution of Object Sightings by Reported Speed of Object(s) With Evaluation Distribution for Each Speed Group 32 Figure 17 Distribution of All Sightings by Observer Location for All Years and Each Year 33 Figure 18 Comparison of Known and Unknown Object Sightings by Color, 1947-1952 . 34 Figure 19 Comparison of Known and Unknown Object Sightings by Number of Objects per Sighting, 1947-1952 . 35 Figure 20 Comparison of Known and Unknown Object Sightings by Speed, 1947-1952 36 Figure 21 Comparison of Known and Unknown Object Sightings by Duration, 1947-1952 37 Figure 22 Comparison of Known and Unknown Object Sightings by Shape, 1947-1952 38 Figure 23 Comparison of Known and Unknown Object Sightings by Light Brightness, 1947-1952 39 Figure 24 Comparison of Monthly Distribution of Object Sightings Evaluated as Astronomical Versus Total Object Sightings Less Astronomical 40 Figure 25 Comparison of Monthly Distribution of Object Sightings Evaluated as Aircraft Versus Total Object Sightings Less Aircraft 41 Figure 26 Comparison of Monthly Distribution of Object Sightings Evaluated as Balloon Versus Total Object Sightings Less Balloon . . . . . . . . . 42 Figure 27 Comparison of Monthly Distribution of Object Sightings Evaluated as Insufficient Information Versus Total Object Sightings Less Insufficient Information 43 Figure 28 Comparison of Monthly Distribution of Object Sightings Evaluated as Other Versus Total Object Sightings Less Other 44 Figure 29 Comparison of Monthly Distribution of Object Sightings Evaluated as Unknown Versus Total Object Sightings Less Unknown 45 Figure 30 Characteristics Profiles of Object Sightings by Total Sample, Known Evaluations, , and Individual Known Evaluations, With Unknown Evaluations Superimposed -46 Figure 31 Frequency of Object, Unit, and All Sightings Within the U. S., 1947-1952, by Subdivisions of One Degree of Latitude and Longitude . 47 Figure 32 Distribution of Object Sightings by Evaluation for the Twelve Regional Areas of the U. S., With the Strategic Areas Located 48 Figure 33 Comparison of Evaluation of Object Sightings in the Strategic Areas of the Central East Region • 49 Figure 34 Comparison of Evaluation of Object Sightings in the Strategic Areas of the Central Midwest Region ' 50 Figure 35 Comparison of Evaluation of Object Sightings in the Strategic Areas of the Central Farwest Region 51 Figure 36 Comparison of Evaluation of Object Sightings in the Strategic Areas of the South Midwest Region 52 Figure 37 Comparison of Evaluation of Object Sightings in the Strategic Areas of the South West Region . . . . . . . ' . 53 I V
Report, cited by the archive. The PDF is mirrored here; the original link is under it. 309 pages are in the text index: search them above, or from the library's search.